More and more businesses and businesspeople are switching from BlackBerry to iPhone or Android. Why? Because of apps like these.

iOS

Documents to Go

Is there any single task more central to the experience of being a business human that opening, editing and saving office documents? Well, that's what Documents to Go does. It goes without saying that editing a huge spreadsheet on an iPhone is no fun, but in a bind, or on the road, DtG will usually get the job done. Above all, it's an ass-saver. $10, iOS

LinkedIn

If you spend most of your time in a suit, LinkedIn is your Facebook, your Twitter, and your MySpace. The service actually makes a lot more sense in app form—just open it up at a conference or meeting or whatever, and you've got everyone's relevant professional information and contact info available immediately. Free, iPhone

WorldCard Mobile

In a sea of shitty business card scanning apps, WorldCard Mobile stands out for, well, working. The scanning interface is visually intuitive, my tested scans were extremely accurate, and integration with the iPhone contacts is tight and simple. Scanning huge stacks is still a chore, but less so than with other, slower apps, or than manual entry. $6, iPhone. (Free trial also available)

OTHERS TESTED:
• TapExpense: For travelers who are terrible at saving receipts
• Bloomberg: Up-to-date finance info, so you can at least feign knowledgeability about the larger business world
• ReaddleDocs : A good way to store documents locally, or sync them with services like Box.net or Dropbox. No editing, for the most part.
• Timewerks: Mobile Billing: Super-fast invoice maker, for freelancers

Android

TouchDown

Though Android has definitely gotten better at Enterprise, you'll still probably need to download TouchDown if your work demands you use Exchange. TouchDown syncs with your Exchange Server to let you send and receive email, manage contacts, view and edit appointments and filter through tasks. It all sounds so simple but TouchDown really is the best way to work with Exchange on your Android phone. And though it's slightly expensive, TouchDown is well worth the 20 bucks (not to mention bonus neat-o features like having e-mails read aloud to you). 30-day trial, Android.$20 for Full Version.

Docs to Go

Docs to Go is the best mobile Office suite for Android your money (all 15 bones of it) can buy. The latest version (now 3.0) is not only DataViz's best looking app, but it's also their most feature rich, heck it even comes with an enhanced file browser that makes finding and organizing files a cinch. And along with the various Office formats, you can also work with Google Docs in Docs to Go (if you're company is progressive like that). If you need to view, edit or create Word, Excel, PowerPoint or PDF files for your job, Docs to Go is the only way to go. View Only, Android.$15 for Full Version.

Google Finance

Google's own stock quote app on Android unsurprisingly ties in nicely with Google Finance. So if you've already set up all your portfolios with Google, it's the easiest way to see how much money you've made, how each stock is performing, and check out charts with the latest news. Free, Android.

OTHERS TESTED:
• Mighty Meeting: Load up PowerPoint presentations on your phone and either project 'em to a room or share your slides over a web browser.
• CamCard: A business card scanner. $15
• ProOnGo Expense: Expense tracker that uses a receipt reader instead of manual entry
• Astro File Manager: Makes it relatively easy to dig up files hiding around in your SD card
• Mobile Defense: Security! Track your Android phone and remote lock, backup and wipe it if necessary. You'll have to wait for the app to come back though